Dredge-frame bushing



w. w. SWAYZE, JR. DREDGE FRAME BUSHING.

APPLICATION FILED JULY 30,1921.

1 98,049, Patented Nov. 22, 1921.

NTOR V/LL/AM W. \SWA 2:, JR.

W VWM A TTORNEYS UNITED sures PATENT OFFICE.

wnmnm wrmmn swarm an, or wILmmeroN, DELAWARE, ASSIGNOR 'ro AMERI- on:MANGANESE sum. commuw, or AUGUSTA, MAINE, A CORPORATION or MAINE.

DREDGE-FBAIE BUSHING.

T 0 all whom it may concern:

Be it known that 1, WILLIAM W; SWAYZE,

'Jr., a citizen'of the United States, and .a

- although it may be used in other relations as will more fullyhereafter appear.

As heretofore constructed, the main shaft of a dredge frame was subjectto considerable wear requiring its frequent renewal, and it isaccordingly an object of the present invention to provide a constructionwhereby the entire wear due to the turning 'ofthe main shaft will beborne by the bushing and the shaft proper will be entirely protectedfrom wear.

A furthe'r object is to provide a construetion whereby the main shaft isprotected from wear despite the enormously high strains to which it isexposed and wherein the jars, impact and side thrusts will be taken upby the bushing and the dredge frame.

A further object is to provide a simple,

practical and efficient construction whereb the bushing is anchored tothe main shaft and not only rotateswith respect, to the main frame, butis also capable of transmit- .ting side or end thrust from the mainshaft to the frame without wear upon the former, .so that the main shaftwhich is an expensive part will be capable of long and extended servlce.

Afurther object is to accomplish the forementioned ends in a simple,practical and economical manner, and with the foregoing and otherobjects in view my inven- .tion consists in the improved bushing andassociated parts illustrated in the accompanying drawings and describedin the following specification, and in such variations and modificationsthereof as will be obvious to those skilled in the art to which myinvention relates, it being understood that changes may be made withinthe scope'of what is, claimed without departing from the spirit of theinvention.

The preferred embodiment of my inven- Specillcation of LettersPatent.

of the bushing; and

bushing, as clearl Patented Nov. 22,

Application fled July so, 1921. Serial No. 488,577.

Fig. 4 is a detail view in front elevation Fig. 5 is a view in verticalsection taken on the line 5-5 of Fig. 4. a

Referring specifically to the several views wherein similar referencenumerals designate corresponding parts, the main frame 10 of the dredgeis provided with a removable socket 11 the same and adjoining portionsof the framebeing provided with a cylindrical bore 12 extendingtherethrough. The sides of the frame adjacent the bore are faced as at13 so that the bushing 14 is capable of rotating within the bore 12 andis held against endwise shifting by outstanding flanges 15 and 16 whichcontact with the faced surfaces 13 of the frame;

The bushing is formed in one piece and is moved into the bore 12 byfirst removing the socket 11, depositing the bushing in the lower halfof the bore and then returning the socket member to place, and sosecuring it by the bolts or other holding means 17. The

5, is provided wit 1 the internal -bore 18 and with an integral key 19projecting therein. This key as illustrated in 'Fig. 5, extends from theouter end of the bushing to a point well toward the inner end or surface20 thereof. p

The outer extremity bf the bushing is also provided with outstandingspaced lugs 21, four in number, anddefining therebetween the alinedslots 22. The main shaft 23, a portion of which only is shown, isprovided with the shoulder 24, which rests against the outer face of theflange 15 and is further provided with a key way opening 25 into whichthe internal key 19 of the bushing extends, thus rigidly locking thebushing to the main shaft throughout practically the entire length ofthe former and thus holding the two against relative turning. In orderdisclosed in Figs. 4 and 'tus.

to further insure the locking of the bushing to the shaft and at thesame time to provide for the transmission of end thrust from the mainshaft to the dredge frame, the main shaft is provided adjacent its outerextrem ity with the slot or opening 26 extending therethrough and intowhich fits the key 27. The key'thus extends diametrically through themain shaft and has its protruding ends seating Within the alined slots22.

A second and smaller keyv 28 extends through the main kc and is so heldby a cotter pin 29 or 0t er equivalent means whereby'the auxiliary key28 and the main ke 29 are securely locked in place.

l Vith the various parts as thus constructed, no Wear Whatever Will bebornev by the main shaft as the bushing- Will turn therewith regardlessof the enormous strains to Which these parts are exposed. Further, theconstant rackin and resulting Wear and tear due to the ropping of thedredge bucket into the material to be excavated, as Well as the enormouslateral or side thrust Will be borne by the bushing which maybe readilyrenewed and thus provide for the economical operation ofthe entireappara:

Havin thusfully described my invention What I c aim is 1. Thecombination With a dredge frame therein, and having a shoulder thereon,a

bushing having spaced flanges and anili- Wardl extending key fitting"into the. key Way s 0t of the shaft andwith the one flange abuttingagainst the shoulder of said shaft,

said frame provided with a bore rotatably reeeivingthe bushing thereinand holding it against endwise shifting, and means engaging theprotruding extremity of the shaft and the bushing and holding the shaftagainst endwise shifting withrelation to the bushing.

2. An apparatus of the class described comprising a supporting memberhaving a bore extending therethrough a bushing rotatably mounted Withinsaidbore and provided With upstandin'gffianges holding it fromdisplacement therefrom, said bushing provided with an-internal integralkey and with alined slots at one extremity, and a shaft having a key Waytherein receiving saidkey of-the bushing, means to prevent the endwiseshifting of the shaft With relation to the bus ingjn one direction, anda key extendin transversely through" the shaft and sea tlng Within thealined slots of the bushing and holding the shaft from end- Wiseshifting in the opposite direction.

3."A bushing formed with end flanges, an internal integral key andoutstanding spaced lugs carried at one extremityof said bushing anddefining a slot therebetween.

Signed at Wilmington, in the county of New Castle and State of DelawareA. D.

-1921- of a shaft provided with a' key way slot,

WILLIAM WILMER SWAYZE, .lr.

